Agrobiological assessment of sunflower hybrids in the conditions of Zaporozhye region

The article is devoted to the agrobiological assessment of Syngenta companies sunflower hybrids, namely SI Ester, SI Arco, SI Aztec, SI Cadix, SI Lascala, SI Kupava, when growing them in the conditions of Zaporozhye region. The leaf surface area in the "star" phase of plants of SI Chester, SI Aztec and SI Kupava hybrids was 61.1 - 66.7 thousand m2/ha, which is on average 15% higher than the leaf area of SI Arco, SI Cadix and SI Lascala hybrids. The diameter of the anthode in the range of 20.5 - 21.7 cm was formed by plants of SI Chester, SI Aztec and SI Kupava hybrids, which was on average 8-12% higher than the corresponding indicator for sunflower plants of SI Arco, SI Cadix and SI Lascala hybrids. The highest weight of 1000 seeds was 67.5 and 63.4 g formed by SI Arco and SI Lascala hybrids, respectively. It was formed by 9-12% less in hybrids SI Kupava, SI Kadix, SI Chester (57.9-59.5 g). The sunflower hybrid SI Aztec had the lowest mass of 1000 seeds among all and amounted to 49.3 g. It was found that the hybrids SI Chester, SI Cadix, SI Lascala and SI Kupava formed the actual yield at the level of 3.42-3.56 t/ha. It was lower for SI Arco and SI Aztec hybrids - 3.2 t/ha. The seeds of SI Chester, SI Aztec and SI Kupava hybrids were distinguished by high oil content - 51.5 - 52.5%. At the same time, the oil content of SI Arco, SI Cadix and SI Lascala hybrids seeds was less, on average by 1.2 times, and amounted to 44.7-46.6%.